* Retire the old 'ifmcstat <kernel>' usage.
* Print AF_LINK records even if run against KVM.
This makes the KVM backend consistent with the sysctl backend.
* Suppress printing of link-layer group records by default.
* Add a -v switch to allow link-layer groups to be printed.
* If compiled without INET6 support, actually work.
* If compiled with INET6 support, print the scope ID of
all IPv6 addresses in both backends.
* Update man page.
* Update copyrights.
With this change, it is now reasonable to retire netstat -g.
Most of the SSM related gunk in this file will require later refactoring.
MFC after: 2 weeks
f694be632b